Ralph: Dad, will you do my math
for me tonight?
Dad: No, son, it wouldn't be
right.
Ralph: Well, you could try.

A
mathematician wandered home at 3 AM. His wife became very upset, telling
him, "You're late! You said you'd be home by 11:45!" The
mathematician replied, "I'm right on time. I said I'd be home by a
quarter of twelve."

Why mathematicians are afraid
drive a car?
Because the width of the road is negligible comparing to its length.